[krb5-auth-dialog/barthalion/gnome-runtime-images-quay] Update (or drop) the Docker image used by Flatpak job

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 380827e175c8f8b49b7ca7c831d6d62d4b82e4a7
Author: Bartłomiej Piotrowski <b bpiotrowski pl>
Date:   Wed Jul 27 12:49:30 2022 +0200

    Update (or drop) the Docker image used by Flatpak job
    
    The gnome-runtime-images have been recently migrated to Quay. This is already reflected in the template.
    
    Please note this MR has been created semi-automatically. If it doesn't make sense, feel free to close it.

 .gitlab-ci.yml | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index faa143d..aae774d 100755
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -28,7 +28,6 @@ build-debian:
     - ninja -C _build
 
 flatpak:
-  image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master
   stage: build
   variables:
     MANIFEST_PATH: 'org.gnome.KrbAuthDialog.json'